'Dross' in the Bible

The fiery bellows of judgment burn fiercely. But there is too much dross to be removed. The process of refining them has proved useless. The wicked have not been purged.

They call them rejected silver [only dross, without value],Because the Lord has rejected them.

Therefore thus says the Lord of hosts,“Behold, I will refine them [through suffering] and test them;For how else should I deal with the daughter of My people?

My message is like a fire that purges dross! It is like a hammer that breaks a rock in pieces! I, the Lord, so affirm it!